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Today's most popular drinks are fizzy drinks which all contain a form of acid.The acid which is in fizzy drinks is harmful to the body if consumed too much and to often

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Introduction

Determination of the total acid concentration in a fizzy drink Introduction Today's most popular drinks are fizzy drinks which all contain a form of acid. The acid which is in fizzy drinks is harmful to the body if consumed too much and to often. It can cause decay of the teeth .The commonest sufferers from tooth erosion are teenagers whose main drink is "pop" (Coca Cola, lemonade or other similar fizzy drinks). All the fizzy drinks have a high acidity and rapidly dissolve enamel. The more frequent the consumption the more damage is done. The type of acid in fizzy drinks is a very weak acid with a pH of about 4-6. ...read more.

Middle

> Using a pipette, pipette out 50ml of sprite into a beaker and add 2-3 drops of phenolphthalein solution into the beaker. > Add the NaOH to the sprite a ml at a time until a colour change is noted (clear � pink) > Repeat this 3 times and get the mean of the three titrations. > For the other two fizzy drinks repeat the method above for both of them. Results Fizzy drinks Amount of NaOH added 1st titration (ml) Amount of NaOH added 2nd titration (ml) Amount of NaOH added 3rd titration (ml) Mean of the titrations (ml) Sprite 7.00 7.1 7.2 7.1 Lemonade 8.5 9.8 9.7 9.3 7 up 16.8 15.7 16.2 16.23 Calculations 7UP OH- + H+ � H2O Mol. ...read more.

Conclusion

The phenolphthalein indicator used in the experiment changed from colourless to a pink colour to show that the equivalence point has been reached. This shows the equivalence point of a strong alkali and a weak acid. This point is very unstable, and the slightest addition of either the weak acid or strong alkali will change the pH dramatically. Conclusion In the above experiment you can see that all fizzy drinks contain H+ ions. Although all fizzy drinks don't contain the same concentration of H+ ions they are still all acidic which mean they will all cause corrosion to your teeth over time if consumed to often. The fizzy drinks with the higher concentrations of H+ ions will cause more damage. ?? ?? ?? ?? Jennifer Chr�tien page1of 3 acid concentration of fizzy drinks Jennifer Chr�tien page1of3 ...read more.

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